Cutting mechanism specially



A. E. SHIRLOW AND H. W. HOARSE. CUTTING MECHANISM SPECIALLY APPLICABLETO PAPER AND OTHER TUBE-MACHINES.

APPLICATION FILED JUNE 1. 1918.

Patented Dec. 16,1919.

L Q '52 W 1% M MAC/M UNITED STATES PATENT OFFICE.

ALBERT EDWARD SHIRLOW, 0F GLEN HUNTLY, NEAR MELBOURNE, AND HENRY'WILLIAM HOARSE, OF GARDEN VALE, NEAR MELBOURNE, VICTORIA, AUS- TRALIA,ASSIGNORS TO JAMES CLASON AUSTRALIA.

GATES, OF MELBOURNE, VICTORIA,

CUTTING- MECHANISM SPECIALLY APPLICABLE TO PAPER AND OTHER TUBEMACHINES.

Specification of Letters Patent. Patented Dec. 16, 1919.

Application filed June 1, 1918. Serial No. 237,776.

To all whom it may concern:

Be it known that we, ALBERT EDWARD SHIRLOW and HENRY WILLIAM HoARsE,both subjects of the King 'of Great Britain, and residents of GlenHuntly, near Melbourne, in the State of Victoria and Commonwealth ofAustralia, and Olinda, 72 Murphy street,

- Garden Vale, near Melbourne, Victoria, and

Commonwealth of Australia, respectively, have invented certain new anduseful Improved Cutting Mechanism Speciall Applicable to Paper and otherTube Mac ines, of which the following is a specification.

This invention relates to improved cutting mechanism speciallyapplicable to paper and other tube machines and has been devised inorder to grovide mechanism of greater utility and e ciency than that atpresent in use.

Hitherto paper and other tubes have been automatically cut into therequired lengths by a single disk cutter but this device is defective inthat the edge of the cut tube is torn or frayed particularly owing tothe fact that a single disk must pass through the whole diameter of thetube and exert a cutting pressure in one direction only.

According to this invention a plurality of cutters (preferably a set offour revolving cutters) are arranged around the paper tube so that whenthe automatic mechanism is operated aneven cut and pressure is exertedaround and through the tube casing with the result that the edges of thetube are cleanly out.

An essential feature embodied in the invention consists in mounting aplurality of cutters around a tube feeding mandrel in such a manner thatthe cutters are automatically closed at predetermined intervals upon andaround the paper or other tube, to effect the cutting operation.

A further essential feature consists in utilizing the tube for pressingagainst trip or lever mechanism to close a clutch operating the gearwhich controls the cutting operation, such lever mechanism being fittedwith means for releasing the cut portion from the tube after eachcutting operation.

A further essential feature consists inthe particular means employed forclosing the cutters upon and around the paper tube at predeterminedintervals.

In order that the invention may be more readily understood, one form ofcarrying the same into practical effect will now be described withreference to the accompanying drawings in which Figure 1 is a view inelevation of portion of an existingpaper tube machine with the improvedcutting mechanism shown partly in section attached thereto.

Fig. 2 is a view in plan of Fig. 1, a'section being taken on line 22Fig. 1, in order to more clearly illustrate the clutch gearing.

Fig. 3 is a view in end elevation, the frame plate being removed forpurposes of illustration.

Fig. 4 is a view in detail of the clutch embodied in the invention.

According to this invention-the paper or other tubing is formedcontinuously by spirally winding paper or other tape in a series oflayers over a mandrel 1. This is effected by belts which pass fromdriving pulleys to and around the mandrel and then to idler and tensionpulleys. These belts wind the paper on the mandrel and feed it along torotary cutter gear 2.

The cutters (preferably fourin number) are mounted in the forked end ofadjustable arms 3 secured in bosses formed on levers 4. The levers4 arefitted with conical rollers 5 which are kept in contact with a conicallyflanged disk 6 by the tension of springs 7. i The disk 6 is mounted onthe journal portion of'the head 8 and has axial reciprocal movementwhich is limited by the set screw 9. The inner frame plate 10 supportingthe cutter levers 4, is formed integral with a Stop plates 14 may besecured to the bosses of the levers 4 to limit the movement of saidlevers.

The disk 6 is reciprocated by lever gear 15 on one arm of which isfitted with a roller 16 which engages an adjustable cam 17 rotated bygear 18 on a shaft 18 which is controlled by the clutch 19.

The gear 18 1s preferably driven by the shaft 20 which is portion of theexisting drive of the belt feed previously described.

flange of the disk 6 farther over the rollers 5 thereby closing thecutters on the paper or other tubing 2*. The tubing in feeding slightlyfarther is finally parted by being forced up the inclined'formed by thedisk 23 as it assumes the position shown in dotted lines Fig. 1, thesevered portion then collapses and allows the clutch gear to return toprevious inoperative position, and the disk and cutters areautomatically returned to the normal position.

Any size tubing can be made by placing the desired mandrel in themachine and any required length can be cut by adjusting the boss 26 towhich the lever 22 is pivoted along the bar 27 and making the requiredcam adjustment. J

As illustrated in Fig. 1, the rocking lever 21 is pivotally connected tothe sheaf 28 which reciprocates the cam block 29. This block 29 when inthe position shown depresses aspring actuated feather 30 keeping thesame out of engagement with any of a series of feather ways 31 formed inthe bore of the member 32 of the gear 18.

When the tubing engages the disk 23'as previously described the block 29moves away from the member 32 and the feather 30 is forced outward andengages one of the feather ways 31, so imparting motion to the cuttergear.

In operation the tube 2 to be cut, is fed along the mandrel 1 and whenit reaches the plate 23 it forces the same outwardly at an angle. Thedisk or plate 23 using the arm 24 as a fulcrum forces the rod 22outwardly so throwing, by means of the rod 25, the clutch 19 into gear,causing the rotation of the gear shaft and cam 17 The cam 17 being incontact with the roller 16 causes the arm 15 to slide the disk 6 intofurther enga ement with the rollers 5 so narrowing the ra ius of thecutters 6 and causing them to close upon and around the tube 2 to enableit to be cleanly cut. The angle which the cut end then takes'causes itto collapse and the whole of the parts are returned to the normalposition ready for the next outward pressure .upon the disk 23.

It will be readily understood that without departing from the spirit andscope'of the invention, the mechanism can be so arranged that thecutting rollers are laterally carried in the same direction and at thesame speed as the tube movement or feed on the mandrel to insure an evenand continuous movement of the tube.

What we claim as our invention and desire to secure by Letters Patent,is

1. In cutting mechanism of the class de-. scribed, the combination of atube carrying mandrel, a plurality of cutters spaced therearound, aconically flanged disk frame coaxial with said mandrel, conical rollers,spring controlled arms carrying said cutters and rollers and adapted tohold the latter against the conical flange on said disk, and mechanismfor automatically throwing the flange of said disk axially over thesurface of the cutting rollers at predetermined intervals to insure aneven cut and pressure of the cutters around and through the tube.

2. Cutting mechanism of the class described characterized in that aplurality of cutters are arranged within a conically flanged disk framearound a tube feeding mandrel, each cutter being carried by armsconnecting levers carrying conical rollers held in contact with theconically flanged disk by springs, the said disk being capable of axlalreciprocal movement, while the levers carrying the cutters connect aplate integral 'with a sleeve carrying a driving pulley, and mechanismfor automatically throwing the conical flange of thedisk over thesurface of the cutter rollers to close the cutting rollers upon andaround the tube at predetermined intervals for the purposes specified.

3. In cutting mechanism of the class described, the combination of aplurality of cutters arranged around a tube feeding mandrel and operatedso that they close upon and around the tube at predetermined intervalswith means such as an axial reciprocal conically flanged disk arrangedto engage conical rollers 'carried by pivoted spring controlled leversformed with arms carrying the said cutters.

47. In cutting mechanism of the class described, means for adjusting thelengths of tube to be cut and for automatically throwin the cutters intooperation consisting of a isk lever arranged forwardly of the machineand in the path of the tubing to be out, being pivoted to and adjustablealong a .vertical lever hinged at its lower end and connecting by meansof an adjustable connecting rod with a rocking lever adapted to controlthe clutch operating the driving gear, an arm formed with a rolleroperating over a cam surface on the driving shaft caus- 3.

ing the conically flanged disk to further engage the conical rollers forclosing the cutters upon and around the tube which when out passes tothe trip disk which using a stop plate or arm as a lever takes adiagonal po='I30 sition and separates the cut portion from the tube, soallowing the cutting mechanism to return to inoperative position as andfor the purposes specified.

5. In cutting mechanism of the class described, the combination of atube feeding mandrel, a plurality of cutters ar-- ranged therearound, aconically flanged disk mounted for axial movement along said mandrel,means engaged by the flange on said disk and adapted to operate saidoutters when the disk is moved in one direction, meansincluding a clutchfor reciprocating said disk, means for separating the cut tube portions,said separating means being 'adapted to control the operation of saidclutch, and means for carrying the cutters in the same direction and atthe same speed as the tube feed on said mandrel.

' 6. In cutting mechanism of the class described, a tube feedingmandrel, a plurality of cutters arranged therearound, a conicallyflanged disk co-axial with said mandrel,

conical rollers, spring controlled arms carry-- ing said cutters androllers, and adapted to hold the latter in engagement with the conofcutters therearound, a conically flanged disk co-axial with said?mandrel, conical rollers, spring controlled arms carrying said cuttersand rollers and adapted to hold the latter in engagement with theconical flange on said disk, means including a clutch for reciprocatingsaid disk' longitudinally of said mandrel, a trip lever in the path ofthe cut tube portions, means controlled by said leverfor operating saidclutch, said means including an adjustable connection to allow ofvarying the position of said trip lever with respect to said cutters,said trip lever being adapted to throw the cut tube portions out ofalinement with,- and to separate them from, said mandrel.

8. In cutting mechanism of the class described, clutch operatingmechanism consisting of a disk lever (as 23) a lever (as 22) aconnecting rod (as 25) connecting a rocking lever (as 21) connecting asheaf (as 28-) adapted to reciprocate a cam block (as 29) adapted todepress a spring actuated feather (as 30)featherways (as 31) formed inthe bore of one member (as 32) of gearing (as 18),the parts being soarranged that when the tube engages the disk lever 23 the block 291noves away from the member 32 and the feather 30 is forced outward andengages one of the featherways to allow of motion to be imparted for thepurposes specified.

Signed at Melbourne, in'the State of Victoria, Australia, this 22nd dayof March, A. D. 1918. ALBERT EDWARD SHIRLOVV. HENRY WILLIAM HOARSE.Witnesses:

ANNIE B. EDWARDS, JEAN D. PATON.

